president barack obama and governor mitt romney. >>reporter: megan, a number of political pundits say tonight's debate from colorado could go a long way towards separating these two candidates currently lock inside a very tight race. the campaigns, though, are downplaying the expectations between the squareoff involving president obama and governor romney. both candidates have spent the past two days prepping with their campaign advisers, focusing on the likely questions they'll face as tonight's topics include domestic policy, especially the economy. governor romney has been preparing in denver and says tonight's debate will not be about finding a definitive winner. >> in my view, it's not so much winning or losing, or even the people themselves, the president or myself, it's about something bigger than that. these debates are an opportunity for to discuss a pathway forward for america that we would choose. >>reporter: the president has been practicing outside oflation. to his supporters he remains confident, but he's not underestimating his opponent. >> governor romney, he's a good